This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A189635 #6 Mar 30 2012 18:57:24 %S A189635 0,0,1,1,1,2,3,3,3,3,3,4,4,4,5,6,6,6,7,7,7,7,7,8,8,8,9,9,9,10,10,10, %T A189635 11,12,12,12,12,12,13,13,13,14,15,15,15,16,16,16,16,16,17,17,17,18,19, %U A189635 19,19,19,19,20,20,20,21,21,21,22,22,22,23,24,24,24,24,24,25,25,25,26,27,27,27,27 %N A189635 Partial sums of A189632. %C A189635 See A189632. %F A189635 s(n)=s([(n+2)/3])+[n/3]-s([n/3]), where s(0)=0, s(1)=0. %t A189635 (See A189632.) %Y A189635 Cf. A189632, A189633, A189634. %K A189635 nonn %O A189635 1,6 %A A189635 _Clark Kimberling_, Apr 24 2011